At the same time, we had proved the validity of the multi-level authentication theory through comparing the test results of the code and the deduced results of the multi-level authentication scheme.
同时,通过对比代码测试结果与多级认证理论推导结果,证实了多级认证理论的正确性。
参考来源 - 可信赖多级认证关键技术的研究与实现·2,447,543篇论文数据，部分数据来源于NoteExpress
因而国际上逐渐形成了两类理论：认证理论和声誉理论。
The international community gradually formed two types of theories: certification theory and reputation theory.
文章介绍了对现有信息隐藏系统模型的攻击形式，指出加入认证理论的必要性。
This paper introduces the attack form to IH system model, points out the necessary of adding authentication theory.
一些学校只好决定撤销花费最大的课程，尤其是新的文凭（一种一边学习理论，一边参加培训的资格认证）估计花费是考大学的两倍。
Some say they will have to abandon the most costly courses, in particular the new “diploma”, a semi-academic, semi-vocational qualification that they reckonis twice as expensive to run as A-levels.
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